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Yaowu Xu authored
Previously, in evaluating reference motion vectors, MVs are always rounded to integer pixel position and SADs are calculated. This commit takes into account the subpixel portion of the mvs, and uses bilinear interpolation to produce reference pixel values in subpixel postions. In addition, SSE is used in place of SAD. Pixels used are 16x2 above and 2x16 to the left. This commmit intends to test the potential of this line of work in term of compression improvement, obviously, the change would increase decoder complexity significantly. Test results std-hd: 1.738%(avg) 1.779%(glb), 1.663%(ssim) derf: 0.472%(avg) 0.477%(glb), 0.418%(ssim) Change-Id: I3ae1b098f6289df78891134d9a5e4bb2fde87a0b
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